VoIP ATA's (Analogue Telephone Adapters) bridge the technical gap between analogue telephones and fax machines in homes and businesses with making VoIP calls over the Internet.
By connecting an ordinary analogue telephone that is already in your house to a VoIP Adaptor, you can benefit from making cheap, crystal clear VoIP calls via a router which is connected to the Internet (and you don't need to turn on your PC).
Understanding FXO and FXS ports
- FXO ports connect to the PSTN network (Telephone Line). VoIP Adapters will have either none or 1 FXO port. Having an FXO port on the adapter will allow you to switch between making/receiving VoIP calls over the Internet and calls over the conventional phone line.
- FXS ports connect to analogue phones or fax machines. VoIP adapters range from 1 or 2 FXS ports. 2 FXS ports for example would allow you to have 1 Cordless DECT phone and one fax machine connected to the VoIP adapter or 2 phones each with their own VoIP line.